synthetic oil vs. standard oil - Kia Forum
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#1 (permalink) Old 01-22-2007, 12:29 PM
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Default synthetic oil vs. standard oil

when i first changed the engine oil in our 05 sorento i used synthetic oil.
the oil was from verius major mfgs, execpt those from Amisol and and their direct compeditors

since i have to change the oil every 3 months to keep my warrenty in place, it never gets to 3,000 miles

the engine synthetic oil never got too discolored, but it was twice the cost. so i changed back to conventional motor oil

what i have noticed is that conventional gets much more discolored quicker, so understanding the not so great difference between regular and synthetic oils (except Amisol and like types) why does this happen ?

i have noticed this in our chevy/astro also

i can only come up with two reasons

one, the synthetic does less of a job of keeping the engine clean
(but i don't think so)

two, the conventional oil is breaking down faster and, for the lack of a better term "cooking the oil"

it looks at this time i will be switching back to common synthetics
(within 4 miles of our house is a "general store/hardware store" that sells Amisol for $6.50 a quart too much for the sorento but i do use it in our emergency standby generator, lawn tractor and snow thrower

what are your thoughts ?
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#2 (permalink) Old 01-22-2007, 03:52 PM
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The synthetic is superior to regular oil. It provides better lubrication so your motor lasts longer. I think your theory about regular oil changing color due to breakdown is correct.

I would pick a good synthetic oil (and excellent filter) and stick with it. Amsoil recommends putting in a new filter, running an engine wash, and then putting in another new filter when switching from regular to synthetic oil. I think the same would hold true for other brands as well.

-- Christian
(Formerly) '02 Sedona EX 3.5 V6
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#3 (permalink) Old 02-02-2007, 11:16 PM
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Some oils get dark, some don't.

Synthetic is definately superior to dino oil, but mainly in the sense that it performs better in extreme heat situations, and can go for much longer before being changed. Your filter, however, can not.

Dirty oil doesn't necessarily equal worn out oil. It means the detergents are doing their job, separating and encasing contaminates.
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#4 (permalink) Old 10-03-2007, 12:27 PM
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#5 (permalink) Old 10-03-2007, 09:59 PM
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#6 (permalink) Old 10-03-2007, 10:54 PM
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synthetic is definately the way to go unless your engine has a break-in period. dino oil should be used during the break in period to properly break the engine in then you can switch to a synthetic. i've been using Mobil 1 Fully Synthetic ever since i did the first oil change on my car and i won't run anything else. Synthetic also reduces or eliminates valve tick at startup becuase it soaks into the metal of the engine and sticks there so it lubricates better. synthetic oil also breaks down slower as mentioned and can be ran in an engine twice as long as a conventional oil. i run mine for 6,000 miles. so it may cost twice as much for synthetic but your engine will last longer and you can run the oil twice as long in your engine. if cost is an issue try running a synthetic blend which has the same effect as a synthetic at a conventional oil's price.

"One who is slack in his work is brother to one who destroys."
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#7 (permalink) Old 10-22-2007, 08:54 AM
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Enjoy the piece of mind, long range cost savings and convenience of using oils that allow extended drains.

AMSOIL - Warranties and the Magnuson-Moss Act
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